Moduli decays and gravitinos

Journal Article · Thu Jun 15 00:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.73.123518· OSTI ID:20774870

Dine, Michael; Morisse, Alexander ^[1]; Kitano, Ryuichiro ^[2]; Shirman, Yuri ^[3]

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1. Santa Cruz Institute for Particle Physics, Santa Cruz, California 95064 (United States)
2. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)
3. T-8, MS B285, LANL, Los Alamos, New Mexico 87545 (United States)

One proposed solution of the moduli problem of string cosmology requires that the moduli are quite heavy, their decays reheating the Universe to temperatures above the scale of nucleosynthesis. In many of these scenarios, the moduli are approximately supersymmetric; it is then crucial that the decays to gravitinos are helicity suppressed. In this paper, we discuss situations where these decays are, and are not, suppressed. We also comment on a possible gravitino problem from inflaton decay.

• OSTI ID: 20774870
• Journal Information: Physical Review. D, Particles Fields, Vol. 73, Issue 12; Other Information: DOI: 10.1103/PhysRevD.73.123518; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGY
DECAY
HELICITY
MATHEMATICAL SOLUTIONS
NUCLEOSYNTHESIS
STRING MODELS
SUPERSYMMETRY
UNIVERSE